Weichai Westport Inc. (WWI) develops, manufactures, and sells advanced natural gas engines (and relevant parts and kits) for use in automobiles, buses, heavy-duty trucks, marine applications and power generation.

WWI engines feature advanced engineering and reliable operation with emissions compliance to China III, China, IV or China V standards. The current engines are widely used in city bus, coach, and heavy-duty truck applications in China or exported to other regions globally.